.loading {
            display: none;
            text-align: center;
            margin-top: 20px;
        }
        
        .spinner {
            border: 3px solid #f3f3f3;
            border-top: 3px solid #667eea;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            animation: spin 1s linear infinite;
            margin: 0 auto 10px;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        .result {
            display: none;
            margin-top: 25px;
            padding: 20px;
            background: #f9f9f9;
            border-radius: 10px;
            animation: fadeIn 0.5s;
            max-width: 360px;
            margin: 0 auto;
            width: 100%;
        }        
        

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .result.success {
            border-left: 4px solid #4caf50;
            background: #f1f8f4;
        }
        
        .result.error {
            border-left: 4px solid #f44336;
            background: #fef1f0;
        }
        
        .video-preview img {
            width: 100%;
            border-radius: 10px;
            margin-bottom: 15px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        
        .video-info h3 {
            color: #333;
            margin-bottom: 8px;
            font-size: 18px;
        }
        
        .video-meta {
            display: flex;
            gap: 15px;
            margin-bottom: 15px;
            flex-wrap: wrap;
            font-size: 13px;
            color: #666;
        }
        
        .download-buttons {
            display: flex;
            gap: 10px;
            margin-top: 15px;
            flex-wrap: wrap;
        }
        
        .download-btn {
            flex: 1;
            min-width: 150px;
            padding: 12px 20px;
            background: #4caf50;
            color: white;
            text-decoration: none;
            border-radius: 8px;
            font-weight: bold;
            text-align: center;
            transition: all 0.3s;
            cursor: pointer;
            font-size: 14px;
            border: none;
        }
        
        .download-btn:hover {
            background: #45a049;
            transform: translateY(-2px);
        }
        
        .download-btn.secondary {
            background: #2196F3;
        }
        
        .download-btn.audio {
            background: #ff9800;
        }
        
        .error-message {
            color: #f44336;
            font-weight: bold;
        }